#1
Best Overall
Water Filters
The Best Under-Sink Filters for PFAS of 2026
Six under-sink filters, from a no-drill renter option to a tankless reverse osmosis system, ranked by how well their PFAS claims are documented.
We may earn a commission when you buy through links on this page. Our editorial rankings are maintained separately from retailer relationships.
PFAS are long-lasting synthetic chemicals that show up in municipal and well water across the US. If you want to cut them at the kitchen tap, an under-sink filter is the most practical place to start. It treats only the water you drink and cook with, and it costs far less than a whole-house system.
Not every filter that says "reduces PFAS" has proof behind it. The picks below favor products certified to NSF/ANSI 53 or 58 for PFOA and PFOS, and where possible, products that independent labs have also tested. One pick, the APEC ROES-50, is not PFAS-certified. We include it because lab results for it are strong, and we label it clearly.
Most households do well with a certified carbon filter. Reverse osmosis (RO) costs more and wastes water, but it removes a wider range of contaminants. The right choice depends on your water, your cabinet and your budget.
Quick picks
Our top recommendations
#2
Best for Maximum PFAS Removal (Reverse Osmosis)
Waterdrop WD-G3P800-W
View on Amazon Read full review →#3
Best Value
Culligan US-EZ-4
View on Amazon Read full review →#4
Best for Renters (No Drilling)
Aquasana AQ-MF-1 (Claryum Direct Connect)
View on Amazon Read full review →#5
Best Higher Capacity
Aquasana AQ-5300+.56 (Claryum 3-Stage Max Flow, chrome; .55 = brushed nickel)
View on Amazon Read full review →#6
Best Budget RO (Lab-Tested, Not PFAS-Certified)
APEC Water Systems ROES-50 (Essence Series)
View on Amazon Read full review →Compare picks
Compare our recommendations
Key specifications and differences across our recommended products.
| Product | Award | Score | Filter type | PFAS certification (as stated by maker) | Third-party certified for PFAS | Filtration stages | Filter capacity (primary cartridge) | Rated filter life | Lowest verified price |
|---|---|---|---|---|---|---|---|---|---|
| Aquasana AQ-5200.56 (Claryum 2-Stage, chrome; .55 = brushed nickel) | Best Overall | 7.8/10 | Carbon block (Claryum), 2-stage | WQA-certified to NSF/ANSI 42, 53 (includes P473 PFOA/PFOS) and 401 | Yes | 2 | 500 gal | 6 months | $112.49 |
| Waterdrop WD-G3P800-W | Best for Maximum PFAS Removal (Reverse Osmosis) | 7.4/10 | Tankless reverse osmosis (with UV LED) | IAPMO R&T to NSF/ANSI 53 for PFOA/PFOS; also NSF/ANSI 42, 58, 372 | Yes | — | — | — | $759.00 |
| Culligan US-EZ-4 | Best Value | 7.8/10 | Carbon block, single cartridge | IAPMO R&T to NSF/ANSI 53 for PFOA/PFOS (>95.8%), plus 42 and 401 (Culligan spec sheet; Culligan store confirms IAPMO and PFOA/PFOS) | Yes | 1 | 500 gal | 6 months | — |
| Aquasana AQ-MF-1 (Claryum Direct Connect) | Best for Renters (No Drilling) | 7.7/10 | Inline carbon block (Claryum), single cartridge | IAPMO-certified to NSF/ANSI 42, 53 (includes P473) and 401; 95% PFOA/PFOS reduction | Yes | 1 | 784 gal | 6 months | $124.99 |
| Aquasana AQ-5300+.56 (Claryum 3-Stage Max Flow, chrome; .55 = brushed nickel) | Best Higher Capacity | 7.4/10 | Carbon block (Claryum) + sediment pre-filter, 3-stage | WQA-certified to NSF/ANSI 42, 53 (incl. P473) and 401; maker claims 99.7% PFOA/PFOS | Yes | 3 | 800 gal | 6 months | $224.99 |
| APEC Water Systems ROES-50 (Essence Series) | Best Budget RO (Lab-Tested, Not PFAS-Certified) | 7.0/10 | Tank reverse osmosis | None for PFAS; WQA certified (NSF/ANSI 58 system performance) | No | 5 | — | 12 months | $179.99 |
Head-to-head
Compare two picks side by side
Aquasana AQ-5200.56 (Claryum 2-Stage, chrome; .55 = brushed nickel) vs Waterdrop WD-G3P800-W
Aquasana AQ-5200.56 (Claryum 2-Stage, chrome; .55 = brushed nickel) vs Culligan US-EZ-4
Aquasana AQ-5200.56 (Claryum 2-Stage, chrome; .55 = brushed nickel) vs Aquasana AQ-MF-1 (Claryum Direct Connect)
Aquasana AQ-5200.56 (Claryum 2-Stage, chrome; .55 = brushed nickel) vs Aquasana AQ-5300+.56 (Claryum 3-Stage Max Flow, chrome; .55 = brushed nickel)
Aquasana AQ-5200.56 (Claryum 2-Stage, chrome; .55 = brushed nickel) vs APEC Water Systems ROES-50 (Essence Series)
Waterdrop WD-G3P800-W vs Culligan US-EZ-4
Waterdrop WD-G3P800-W vs Aquasana AQ-MF-1 (Claryum Direct Connect)
Waterdrop WD-G3P800-W vs Aquasana AQ-5300+.56 (Claryum 3-Stage Max Flow, chrome; .55 = brushed nickel)
Waterdrop WD-G3P800-W vs APEC Water Systems ROES-50 (Essence Series)
Culligan US-EZ-4 vs Aquasana AQ-MF-1 (Claryum Direct Connect)
Culligan US-EZ-4 vs Aquasana AQ-5300+.56 (Claryum 3-Stage Max Flow, chrome; .55 = brushed nickel)
Culligan US-EZ-4 vs APEC Water Systems ROES-50 (Essence Series)
Aquasana AQ-MF-1 (Claryum Direct Connect) vs Aquasana AQ-5300+.56 (Claryum 3-Stage Max Flow, chrome; .55 = brushed nickel)
Aquasana AQ-MF-1 (Claryum Direct Connect) vs APEC Water Systems ROES-50 (Essence Series)
Aquasana AQ-5300+.56 (Claryum 3-Stage Max Flow, chrome; .55 = brushed nickel) vs APEC Water Systems ROES-50 (Essence Series)
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#1
Best Overall
Aquasana AQ-5200.56 (Claryum 2-Stage, chrome; .55 = brushed nickel)
Certified PFOA/PFOS reduction, no wastewater, and a Wirecutter favorite
Full product review →
7.8
/10
Lowest verified price
$112.49
at Amazon
A two-stage Claryum carbon-block filter with its own faucet. It needs no power and makes no wastewater.
Why we like it
The AQ-5200 is WQA-certified to NSF/ANSI 42, 53 (including P473 for PFOA and PFOS) and 401. That covers PFAS, lead and chlorine in one cartridge set. Wirecutter names it its favorite under-sink filter, and Consumer Reports lists it among PFAS-removing under-sink models.
It is also affordable to buy, and Amazon.com sells and stocks it. Filters run about $148 a year, higher than the Culligan but reasonable for the certification.
What to know
Skip it if you need fluoride, TDS or nitrate reduction. It does not remove them. Also skip it if you can't add a faucet hole.
Pros
- Certified to NSF/ANSI 42, 53 (P473) and 401
- Favorite under-sink filter at Wirecutter
- No wastewater and no electricity
- Sold and stocked by Amazon.com
Cons
- Some owners report leaks, mostly from over-tightened O-rings
- Replacement set costs about $148 a year
- No TDS or fluoride reduction
- Aquasana's own store now sells the AQ-6200 successor
Score breakdown
PFAS reduction evidence
8.5
Other contaminant coverage
7.0
Value
8.5
Installation & cabinet fit
7.5
Flow & daily convenience
6.0
Health, materials & sustainability
8.0
Reliability & support
7.0
Where to buy
Prices are checked periodically. Older amounts are labeled with their last verification date.
| Retailer | Price | Availability | |
|---|---|---|---|
| Amazon Lowest | $112.49 $199.99 | In Stock | View deal |
#2
Best for Maximum PFAS Removal (Reverse Osmosis)
Waterdrop WD-G3P800-W
The best-documented PFAS removal here, if you have an outlet and a drain
Full product review →
7.4
/10
Lowest verified price
$759.00
at Amazon
A tankless, pump-driven reverse osmosis system rated at 800 gallons per day with a smart faucet. It adds NSF/ANSI 58 and 372 certification.
Why we like it
This is the only pick that is both certified for PFOA/PFOS (IAPMO, NSF/ANSI 53) and independently lab-verified. Quality Water Lab's 14-compound PFAS panel found every compound below reporting limits. It is also certified to NSF/ANSI 42, 58 and 372 (low-lead materials).
Being tankless saves cabinet space compared with older RO designs, and the 3:1 pure-to-drain ratio is among the more water-efficient. Filters run about $145 a year.
What to know
Skip it if you rent, lack an outlet under the sink, or have low-PFAS water that a carbon filter can handle at a fraction of the cost.
Pros
- Certified for PFOA/PFOS and lab-tested across 14 PFAS compounds
- Also certified to NSF/ANSI 42, 58 and 372
- Tankless design
- Broad RO coverage including TDS
Cons
- Premium price; street prices vary widely, so confirm you're buying the base unit
- Needs an outlet, a drain connection and a dedicated faucet
- Without the optional remineralization cartridge, Water Filter Guru measured pH dropping from 7.3 to 6.3
- 1-year warranty
Score breakdown
PFAS reduction evidence
9.0
Other contaminant coverage
9.0
Value
5.0
Installation & cabinet fit
5.0
Flow & daily convenience
8.0
Health, materials & sustainability
7.0
Reliability & support
6.0
Where to buy
Prices are checked periodically. Older amounts are labeled with their last verification date.
| Retailer | Price | Availability | |
|---|---|---|---|
| Amazon Lowest | $759.00 $999.00 | In Stock | View deal |
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#3
Best Value
Culligan US-EZ-4
The cheapest certified PFOA/PFOS filter here, with low yearly cartridge costs
Full product review →
7.8
/10
A single-cartridge carbon filter with a dedicated faucet and twist-change replacement. It carries a 2-year warranty.
Why we like it
Culligan's spec sheet lists IAPMO R&T certification to NSF/ANSI 53 for PFOA/PFOS (above 95.8%) plus NSF/ANSI 42 and 401. The Washington State Department of Health's PFAS filter list links to it. Culligan's own store lists the unit at roughly $98, while the Amazon listing, from a third-party seller, is a bit higher, close to the AQ-5200.
The real saving is in the cartridges, about $108 a year, the lowest of any certified option here. The 2-year warranty is longer than most rivals offer.
What to know
Skip it if you want independent lab results or an editor-style recommendation. Its main review mention is a dated 2022 Good Housekeeping pick.
Pros
- IAPMO-certified for PFOA/PFOS, plus NSF/ANSI 42 and 401
- Lowest annual cartridge cost of the certified picks
- 2-year warranty
- On the Washington State DOH PFAS filter list
Cons
- Single stage with 0.5 gpm flow
- Install errors can cause leaks
- Amazon price is from a third-party seller
- Check the box for the PFOA/PFOS claim, as some documents omit it
Score breakdown
PFAS reduction evidence
8.0
Other contaminant coverage
6.5
Value
9.5
Installation & cabinet fit
7.5
Flow & daily convenience
6.0
Health, materials & sustainability
7.5
Reliability & support
7.5
Where to buy
Prices are checked periodically. Older amounts are labeled with their last verification date.
| Retailer | Price | Availability | |
|---|---|---|---|
| Amazon | $92.96 $99.95 | Available From 2026 11 13 | Check at retailer |
#4
Best for Renters (No Drilling)
Aquasana AQ-MF-1 (Claryum Direct Connect)
A certified no-drill filter for renters and crowded cabinets
Full product review →
7.7
/10
Lowest verified price
$124.99
at Amazon
A single inline Claryum cartridge that connects between the cold valve and your existing faucet. There is no second tap and no hole to drill.
Why we like it
The install is the draw. It fits without drilling, so it suits renters and cabinets with no room for another faucet. Aquasana's performance data sheet lists NSF/ANSI 42, 53 (P473, 95% PFOA/PFOS) and 401, with 1.5 gpm flow and a 784-gallon cartridge.
The flow is three times that of the faucet-based Aquasana models, so filling a pot is faster.
What to know
Skip it if you want filtered hot water or independent corroboration. Only cold water is filtered, and the certification rests on Aquasana's own data sheet. Sources also differ on whether the certifier is IAPMO or WQA.
Pros
- No drilling and no second faucet
- Certified to NSF/ANSI 42, 53 (P473) and 401
- 1.5 gpm flow
- 784-gallon cartridge
Cons
- Only cold water is filtered
- Certifier named inconsistently across listings
- No independent review found
- 1-year limited warranty
Score breakdown
PFAS reduction evidence
7.5
Other contaminant coverage
7.0
Value
8.0
Installation & cabinet fit
9.5
Flow & daily convenience
8.0
Health, materials & sustainability
7.5
Reliability & support
6.0
Where to buy
Prices are checked periodically. Older amounts are labeled with their last verification date.
| Retailer | Price | Availability | |
|---|---|---|---|
| Amazon Lowest | $124.99 $249.99 | In Stock | View deal |
#5
Best Higher Capacity
Aquasana AQ-5300+.56 (Claryum 3-Stage Max Flow, chrome; .55 = brushed nickel)
Wirecutter's upgrade pick adds a sediment pre-filter and bigger cartridges
Full product review →
7.4
/10
Lowest verified price
$224.99
at Amazon
A three-stage Claryum carbon system with 800-gallon cartridges. It has the same certification as the AQ-5200.
Why we like it
It matches the AQ-5200's WQA certification to NSF/ANSI 42, 53 (P473) and 401, with 99.7% PFOA/PFOS reduction claimed by Aquasana. It adds a sediment pre-filter, which helps if your supply carries grit that would clog carbon. Wirecutter calls it its upgrade pick.
Cartridges last longer, so heavy-use kitchens change them less often.
What to know
Skip it if you expect higher flow. Despite the Max Flow name, it is rated at 0.5 gpm, the same as the 2-stage. Most buyers should save money with the AQ-5200.
Pros
- Same certification as the AQ-5200
- Sediment pre-filter
- 800-gallon cartridges
- Wirecutter's upgrade pick
Cons
- Roughly double the AQ-5200 price at the listing we checked
- Amazon seller is a third party
- Replacement set was out of stock at Aquasana
- Some owners report connection leaks after a couple of years
Score breakdown
PFAS reduction evidence
8.5
Other contaminant coverage
7.5
Value
6.5
Installation & cabinet fit
7.0
Flow & daily convenience
6.5
Health, materials & sustainability
8.0
Reliability & support
6.0
Where to buy
Prices are checked periodically. Older amounts are labeled with their last verification date.
| Retailer | Price | Availability | |
|---|---|---|---|
| Amazon Lowest | $224.99 $449.99 | In Stock | View deal |
#6
Best Budget RO (Lab-Tested, Not PFAS-Certified)
APEC Water Systems ROES-50 (Essence Series)
A budget RO system with strong lab results but no PFAS certification
Full product review →
7.0
/10
Lowest verified price
$179.99
at Amazon
A five-stage, tank-based reverse osmosis system that needs no power. It is the lowest-priced RO option in this guide.
Why we like it
In TechGearLab's Tap Score testing it removed 100% of total PFAS, lead, arsenic and uranium, and 98% of fluoride. Filters cost about $75 a year, and the system costs far less than the Waterdrop.
It is the choice if you want fluoride, arsenic or TDS removal on a budget and have the cabinet space.
What to know
Skip it if certification matters. Its WQA certification covers NSF 58 system performance, not PFAS, so it ranks below every certified pick. Also skip it if you can't give up cabinet space or dislike wasted water.
Pros
- 100% total PFAS removal in Tap Score testing
- Removes lead, arsenic, uranium and fluoride
- Low yearly filter cost
- No electricity needed
Cons
- No PFAS certification
- About 3 gallons of wastewater per gallon filtered
- Bulky tank and harder install
- Water can taste flat
Score breakdown
PFAS reduction evidence
7.0
Other contaminant coverage
8.5
Value
8.5
Installation & cabinet fit
4.5
Flow & daily convenience
5.0
Health, materials & sustainability
6.0
Reliability & support
7.0
Where to buy
Prices are checked periodically. Older amounts are labeled with their last verification date.
| Retailer | Price | Availability | |
|---|---|---|---|
| Amazon Lowest | $179.99 $230.99 | In Stock | View deal |
Our process
How we review water filters
PickMetric's picks come from research across independent tests, manufacturer specs and owner feedback. Sources included Wirecutter, Consumer Reports, Water Filter Guru, Quality Water Lab, TechGearLab, manufacturer performance data sheets and the Washington State Department of Health PFAS filter list. Each product was scored on seven criteria: PFAS evidence (weighted most heavily), value, contaminant breadth, installation fit, daily use, health and materials, and reliability.
PFAS evidence counts most because it is the point of this guide. A current NSF/ANSI 53 or 58 PFOA/PFOS certification, backed by independent lab results, scores highest. Marketing claims alone score lowest. Every pick was then challenged in a structured review before publication.
How We Picked
We compared 15 products using independent tests from Wirecutter, Consumer Reports, Water Filter Guru, Quality Water Lab and TechGearLab, along with manufacturer spec sheets, certification listings and owner feedback. PFAS evidence carried the most weight, followed by value, contaminant breadth, installation, daily use, materials and reliability.
Every pick was challenged before publication, and the review changed the lineup. The Culligan US-EZ-4 was added as a certified budget option and took the Best Value award, after an early draft had given that slot to an uncertified RO system. Two uncertified filters, the Waterdrop 10UA and G3P600, were dropped. The Aquasana AQ-5300+ award was reframed from high flow to higher capacity, because its rated flow matches the cheaper model. The AQ-MF-1's evidence score was also lowered because no independent review backs its certification.
Ranks follow the overall score, except that the Waterdrop G3P800 holds the second slot as the Best for Maximum PFAS Removal pick. It is the one choice for buyers who need RO.
What to Look For
Certification for PFOA and PFOS
Look for NSF/ANSI 53 (carbon filters) or 58 (RO) with PFOA/PFOS reduction, issued by NSF, WQA or IAPMO. Aquasana lists this as P473. A "reduces PFAS" label without a certification is a marketing claim. Check the box or the performance data sheet.
Carbon block or reverse osmosis
Certified carbon block filters handle PFOA/PFOS, lead and chlorine, make no wastewater and need no power. RO also removes TDS, fluoride, arsenic and nitrate, but it wastes water, takes more space and usually needs an outlet or a tank. Choose RO if a water test shows contaminants carbon can't remove.
Installation
Most systems add a small faucet, which needs a hole in the sink or countertop. Inline models like the AQ-MF-1 skip the hole but filter cold water only. RO needs a drain connection.
Running costs
Cartridge cost matters more than sticker price over several years. Annual costs here range from about $75 for the APEC to about $148 for the AQ-5200. Replace on schedule.
Test your water first
A local water report or lab test tells you which PFAS, if any, are present, and whether you need RO's wider coverage.
Health, Materials & Safety
Lead-free materials matter for anything that touches drinking water. The Waterdrop G3P800 is certified to NSF/ANSI 372 for low lead content. Aquasana states its systems are BPA-free, though for the AQ-MF-1 that statement is not confirmed for the specific model. We found no CPSC recalls for the picks we checked.
RO strips minerals. Without the optional remineralization cartridge, Water Filter Guru measured the Waterdrop's output pH dropping from 7.3 to 6.3. The APEC can taste flat for the same reason. Carbon filters leave minerals in place.
Wastewater and power also differ. Carbon filters use neither. The APEC wastes about 3 gallons per gallon filtered. The Waterdrop is rated at 3:1 pure-to-drain and uses a pump and UV LED, so it draws electricity.
Other Under-Sink Filters for PFAS We Considered
Pentair FreshPoint F2000-B2M has strong total-PFAS certification, but it is listed as discontinued and its successor is sold mainly through plumbing retailers.
Brondell Coral UC300 is PFOA/PFOS-certified, but was out of stock on Amazon when we checked.
Waterdrop G3P600 and 10UA are not PFAS-certified. The 10UA also removed 0% of lead in TechGearLab testing.
APEC ROES-PH75 has no PFAS certification or published PFAS lab result, and had the worst measured water recovery in Water Filter Guru testing.
iSpring RCC7AK has no PFAS certification, and its 91% lab PFAS result trails the other RO units.
Kraus FS-1000 has conflicting documents on whether it is PFAS-certified.
Clearly Filtered 3-Stage has no third-party PFAS certification, and labs found sodium and potassium spikes and cobalt above a guideline.
Cloud RO is sold direct only and its PFAS removal is an uncertified manufacturer claim.
FAQ
Do under-sink filters remove PFAS?
Certified ones do. Look for NSF/ANSI 53 or 58 certification that names PFOA and PFOS. Several of these picks meet that standard. Certification tests specific compounds, so it does not guarantee removal of every PFAS.
Is reverse osmosis better for PFAS?
It has the widest documented coverage, and the Waterdrop G3P800 was tested across 14 PFAS compounds. But certified carbon filters also meet the PFOA/PFOS standard, and they avoid wastewater and cost less.
How often should I change the cartridge?
Every six months for the Aquasana and Culligan carbon filters, or at the rated gallon capacity, whichever comes first. The APEC's filters are rated at 12 months. A spent cartridge loses its protection.
Can I install one myself?
Carbon systems are a reasonable DIY job. Leaks usually come from over-tightened or poorly seated fittings. RO systems and the APEC in particular are harder, and many people hire a plumber.
Will it filter hot water?
No. These filters are for cold water only. With the AQ-MF-1, hot water from the main faucet bypasses the filter entirely.
What if the AQ-5200 is sold out?
Aquasana's AQ-6200 successor carries the same NSF/ANSI 42, 53 (P473) and 401 certifications.
Bottom line
For most people on city water, the Aquasana AQ-5200 is the safest pick: certified for PFOA/PFOS, simple to run and free of wastewater. Choose the Culligan US-EZ-4 to keep yearly costs low, and the AQ-MF-1 if you can't drill. Step up to the Waterdrop G3P800 if your water test shows high PFAS or high dissolved solids and you have the space and outlet. Whatever you buy, replace cartridges on schedule, because a spent filter stops protecting you.